this cold be a connection problem or the speed sensor buffer may not be doing it's job. you'll have to go further into it or have apro look at it.
Jun 11, 2012 at 7:30 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.